Heating and ventilating apparatus



(No Model.) 2 Sheets-Sheet 1.

J. A. BAXTER.

HEATING AND VENTILATING APPARATUS.

No. 430,726. Patented June 24, 1890.

(No Model.) '2 Sheets- Sheet 2.

J. A. BAXTER.

HEATING AND VENTILATING APPARATUS.

No. 480,726. Patented June 24,1890.

UNITED STATES PATENT OFFICE.

JOHN A. BAXTER, OF MINNEAPOLIS, MINNESOTA.

H EATING AN D VENTI LATI N G APPARATU S.

SPECIFICATION forming part of Letters Patent No. 430,726, dated June 24, 1890.

Application filed December 23, 1889. Serial No. 334,645. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN A. BAXTER, of Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain Improvements in Heating and Ventilating Ap- 1paratus, of which the following. is a specifica- This invention is designed for use in connection with a suitable. steam-boiler, and the object is to utilize for heating purposes the heated products of combustion as they pass from the boiler and before they enter the smoke-stack. By this means the heat that is usually carried off in the products of combustion is completely utilized without decreasing the steam-generating capacity of the boiler or adding to the cost of the generation of steam.

In the accompanying drawings, forming a part of this specification, Figure 1 is a plan view, partly in section, of my improved apparatus. Fig. 2 is a transverse vertical section on line moot Fig. 1 with the fan-casing partly broken away.

In the drawings, 2 represents a suitable boiler that may be used for generating steam for running an engine, or for any other suitable purpose.

3 represents the boiler-tubes, and 4 the head of the boiler, from which a flue ordinarily extends to a suitable chimney or smokestack. I connect a flue 5 with the boilerhead and also with a suitable smoke-stack 7, and I provide this flue with a suitable damper 9, by means of which the flue maybe closed. A flue 11 is also connected with the boiler-head, and it extends into a suitable room 15, where it is connected to a stack of pipes 17 by means of a plate or head 19. A second series of pipes 21 is also preferably arranged in said room, connection being made between the two sets of pipes bya pipe or flue 23. The second series of pipes are connected to a pipe 25, and this pipe connects with the pipe or flue 5. A fan 27 is preferably arranged in the flue 5 at a point near the smoke-stack 7. A damper 29 is arranged in the pipe 11, by means of which said pipe may be closed. The room 15 forms an airheating room or chamber, and is provided, preferably, with an inlet-opening 33 with an outlet 35, at which point is preferably located a fan 37, and from the fan-casing extend one or more pipes 39 leading to the rooms or apartments to be heated. The damper or valve 9 in the flue 5 being closed and the damper in the flue 11 being opened and the fan 27 being driven at any desired speed, the products of combustion, after passing through the flue to the boiler, pass through the flue 11 and then through the series of pipes 17 and 21, through the pipe or flue 25 into the flue 5, and thence to the smoke-stack. The fan 27 draws the products of combustion through these flues and pipes, and thus prevents lessening the draft of the boiler-fun nace. The pipes 17 and 21 are highly heated by this means, and the heat that is utilized for heating these pipes would otherwise have passed into the smokestack and been wasted. The fan 37 causes a supply of fresh air to be drawn through the rec m-chamber 15, passing between and among the pipes 17 and 21, and being highly heated thereby. The heated air is then drawn out of this room by said fan and driven through the flues or pipes 39 to the rooms or apartments to be heated. A door 41 is preferably arranged within the heating room or chamber-'15, and by opening this door more or less of the portion of the air which passes through the chamber will be allowed to pass around the heating-pipes instead of passing through them, and will therefore not be heated. By this means the temperature of the air passing through the flues 39 may be governed.

This invention will be found to be particularly applicable for use in school-buildings, court-houses, and other large buildings where it is desired to furnish a large amount of fresh heated air to the rooms or apartments of the building.

I claim as my invention- 1. The combination, with the boiler 2 and smoke-stack 7, of the flue 5, extending from the head of said boiler to said smoke-stack and provided with a suitable damper 9 and fan 27, of the flue 11, also connected with the head of said boiler and provided with a damper 29, the series of heating pipes 17 and 21, and the pipe 25, connected with said heating-pipes and with said flue 5, substantially as described.

2. The combination, with the boiler, the

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flue 5, extending from the head thereof, and the room 15, of the flue 11, connecting the boiler with said room, a series of pipes 17, located in said room and connected to the flue 11, a series of pipes 21, located in the same room, a flue 23, connecting the series of pipes 17 and 21, and means connected with the pipes 21 to draw the products of combustion through said flues and pipes, substantially as and for the purposes set forth.

8. The combination, With the boiler and the heating-chamber 15 and a suitable smoke stack or pipe of the flue 5, extending from the head of the boiler to said smoke-stack and provided with a fan 27 and damper 9, of a series of heating-pipes 17 and 21, arranged JOHN A. BAXTER. In presence of A. 0. PAUL, BEssIE BOOTH. 

